@type t() :: %DocuSign.Model.ExtensionData{
  actionContract: String.t() | nil,
  actionInputKey: String.t() | nil,
  actionName: String.t() | nil,
  applicationId: String.t() | nil,
  applicationName: String.t() | nil,
  connectedFieldsData: DocuSign.Model.ConnectedData.t() | nil,
  connectionInstances: [DocuSign.Model.ConnectionInstance.t()] | nil,
  extensionContract: String.t() | nil,
  extensionGroupId: String.t() | nil,
  extensionName: String.t() | nil,
  extensionPolicy: String.t() | nil,
  publisherName: String.t() | nil,
  requiredForExtension: String.t() | nil
}